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我无法解决此错误： android.view.ViewRootImpl$CalledFromWrongThreadException: 只有创建视图层次结构的原始线程才能触摸其视图。

TextView score;
private SharedPreferences speicher;
private SharedPreferences.Editor editor;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    score = (TextView) findViewById(R.id.score);
    speicher = getApplicationContext().getSharedPreferences("Daten", 0);
    editor = speicher.edit();
    loadfile("score" , score);

    new Timer().scheduleAtFixedRate(new TimerTask() {
        public void run() {
            Integer scorealt = Integer.parseInt(speicher.getString("score", null));
            Integer scorenewe = scorealt + Integer.parseInt(speicher.getString("anz", null));
            score.setText(scorenewe.toString());
            savefile("score", scorenewe.toString());
        }
    }, 0, 2000);
}

我不能score. score.setText(scorenewe.toString());在第 45 行改变

android.view.ViewRootImpl$CalledFromWrongThreadException: 
    Only the original thread that created a view hierarchy can touch its views. …